Leather beveling and splitting machine



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@ct. 30 1923. v F. W. SIMON LEATHER BEVELING AND SPLITTING MACHINE Filed Dec. 13, 1921 3 Sheets-Sheet. 1

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(w. 30, 1923. amzmw F. W. SIMON LEATHER BEVELING AND JSPLITTING MACHINEFiled Dec. 1 5 1921 a swans-sneak;

Patented @ct. 3d), 1923 UNETJED STATES anner.

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LEATHER BEVELING: AND SPLITTING MACHINE.

Application filed December 13, 1921.

To all whom it may concern:

Be it known that I, Fnrnnnrorr VVILHELM SIMON, a citizen of the Republicof Germany, residing at Oberursel, near Frankfort-onthe-Main, Germany,have invented certain new and useful Improvements in a New or ImprovedLeather Beveling and Splitting Machine, of which the following is aspecification.

The invention relates to a new or improved machine for beveling orsplitting leather belts or the like and more particularly to that typeof such a machine in which the leather belt is drawn against a straightknife blade.

The object of the invention is to eliect the beveling independent of theskillof the operator by forcing the belt automatically more and moreagainst the cutting edge, so that a perfect wedgeshaped edge isobtained. The invention also provides means to enable any desired angleof inclination to be produced. Inasmuch as at equal angles ofinclination the length of the bevel depends upon the thickness of theleather, appliances are provided to measure in a simple manner thethickness of the belt prior to the cutting and then to exactly adjustthe length of the beveled face to be produced in accordance with theascertained thickness of the belt, in order that not more of thematerial is split off than is absolutely necessary for a uniformlysharply terminating cutting profile.

By a simple adjustment of the machine it may also be adapted forequalizing belts, that means splitting or cutting them down to a uniformthickness throughout their length.

In the accompanying drawings Fig. 1 shows a cross-section through theimproved machine,

Fig. 2 a front elevation,

Fig. 3 a side elevation and Fig. 4 is a plan of same.

Figs. 5 and 6 are some details of the construction, while Figs. 7 and 8illustrate a modified construction of the improved machine incrosssection and front elevation.

Referring to Figs. 1-6, it will be seen that the belt to be beveled atits 'end, is drawn through between a pair of rollers a and b gearedtogether by wheelsc and driven by on a crank-handle f through pinion eand spur Serial No. 521,996.

wheel d. Instead of the drawing rollers a, Z), any other suitabletransporting device for the belt may be employed, for instance movableclamps, as shown in Figs. 7 and 8, de scribed further on. The knife 9 iseither stationary or it is adapted to be reciprooated horizontally bybeing provided at its extended end with a pin 72, engaging an inclinedgroove 8 in the hub of the crank. Below the knife blade there isprovided a roller disposed in the ends of oscillating arms 70 and Zkeyed upon a rocking shaft t. One of the oscillating arms l is providedwith a tail which rests against a cone m. The cone m is provided with ascrew-threaded bore and rides upon a screw-threaded spindle n whichforms an extension of the journal of the roller 6. The cone is providedat its wider end with a flange having recesses adapted to be engaged bythe nose of a pawl 0 whereby the cone is prevented from rotating. Theoscillating frame carrying the roller 71 can be raised or lowered bymeans of a nut p (see in particular Fig. 6). The measuring of thethickness of the leather is effected between the knife 9 and thesupporting roller 2', the latter as the movable member of the measuringdevice being forced towards the knife blade by the rising of the rockingarms is and Z keyed to the shaft t. A pointer in fixed on the hub of therocking arm Z indicates the thickness of the belt to be beveled orequalized upon the scale 1: provided upon the frame of the machine.

At the back of the machine there is disposed a table u provided with anumber of scales (A, B, C X, Y, Z). The divisions of the scales indicatehow far the end of the belt must project beyond the knife in order thatat the thickness of the belt indicated upon. the scale the bevel turnsout uniform and sharp right up to the edge. With each scale correspondsone of the conical nuts m m m -m", m, m, as shown in Fig. 5. The conicalnuts produce different bevels at equal thickness of belts and thereforea suitable conical nut may be selected by the aid of the scale, if acertain length of bevel is prescribed and which nut will then give aperfect sharply terminating profile for the cut.

The machine is operated in the following manner. The belt to be beveledat the end is passed through between the rollers a and p th s case. tleknife g is not adapted to b and below the knife g into the machineuntil its end projects approximately so far beyond the knife blade asthe bevel should be long. The thickness of the belt is then measured byforcing the roller i against the knife 9 and reading the result off uponthe scale o. Now the end of the belt is put exactly upon the mark of oneof the scales upon the table a which corresponds with the thickness ofthe belt, the conical nutbelonging to this scale is screwed upon thespindle a and moved againstthe tail of the arm Z until the pointer wagain moves upon the mark indicating the previously read off thickness.The pawl 0 is then put upon the flange of the cone. If now the crank 7'is turned, the rollers. co and 7) will slowly rofate and pull the beltaoainst the blade of the reciprocating liIllIG; simultaneously theconem, owing to the engagement of the ,pawl 0 with one of the notches inits flange is unable to rotate any longer, rides upon the threadedspindle atowards the roller 7) and exerts a pressure upon the tail ofthe aunt, whereby the roller 71 is caused to approach nearer and, nearerto the knife blade whichpenetrates deeper and deeper into the substanceof the belt. In this manner a perfectly uniform wedge-shaped and at theend of the belt sharply terminating bevel is produced without any demandon the skill of "the operator.

if the machine is to'be employed for equalizing purposes, the conicalnuts m and the pawl 0 are not made use of. The roller '5 is simply rased by the aid of the nut p to such an extent, that the pointer w setsitself upon the scale o to the desired thickness of the belt. The roller91 then remains stationary in relation to the knife blade, so that onlythe portions of the belt which are thicker than the distance between theblade apf d the supporting roller are split or shaved o In the Figures 7and 8 a modification of the machine is shown, in which instead of thedrawing rollers a, b a movable clamping device is employed for drawingthe belt against the knife. This clamping device is supported upon tworacks 2 and 3 guided in the'frame of the machine. It consists of a lowerfixed part AL and a loose rail 5 which by means of a screw provided witha handwheel 7 and'passing through a bridge-piece s adapted to force therail 5 against the .fixed part i and thus to clamp the belt betweenthem. The racks 2 and 3 obtaintheir mot n from a pin on upon a shaft 10which t one e d s furnished with a crank f and he er end is providedwith the neces *arv svrmvthread n for the conical nut m.

rnc'procate hor zontally, but .is secured in e machine frame. Setscrews8 and 9onhleit to be adjusted vertically.

1 ,avaoea As a matter of course the machine may equallywell be driven bypower as by the Land-crank shown in the drawings by Way of example.Other modifications within the ambit of the claims will easily suggestthem selves.

I claim: I

1. In a leather beveling and splitting machine, the combination with. aknife blade, of a support for the article operated upon cooperating withsaid knife blade and provided with an oscillating arm, and means forcausing the support to approach the knife blade during the beveling,said means including a rotating screw-spindle, and aconical nut adaptedto ride axially on said rotating spindle and against which theoscillating arm rests.

2. In a leather beveling and splitting machine, the combination with aknife holder, of a support for the article operated upon co-operatingwith said knife blade and provided with an oscillating arm, and meansfor causing the support to approach the knife blade during the beveling,said means including a rotating screw-spindle, a conical nutadapted toride axially on Said rotating spindle and against which the oscillatingarm rests, and a pawl connected'with said oscillat ng arm andco-operating with said conical nut to lock the latter against rotation.

3. In a leather beveling and splitting ma chine, the combination with aknife blade, of a support for the article operated upon, means forcausing the said support toapproach the knife blade during'the bevelingoperation, including a rotating screw spindle and a conical nutadapte'd' to ride axially upon said spindle, and means for measuring thethickness of the article to be treated between the said knife and saidsupport.

4. In a leather beveling and splitting machine, the combination with aknife blade, of a supportv for the article operated upon,

means for causing the said support to approach the knife blade duringthe beveling operation including a rotating screw spindle and a conicalnut adapted to ride axially upon said spindle, and means for' measuringthe thickness of the article to be treated between the said knifeandsaid support, said measuring means comprising a pointer fixed to saidsupport to move therewith, and

a scale with which said pointer co-operates.

5. Ina leather beveling and splitting 'machine, the'combination-with aknife blade,

of a support for the article operated upon, means for causing the saidsupport to approach the knife blade during the bevel ing operationincluding a rotating screw spindle and a conical nut adapted to rideaxially upon said spindle, means for measuringthe thickness'of thearticle to be treated between the said knife and said support, a tablein proximity to the said support having thereon different scales, eachscale corresponding with a conical nut and being divided according tothe thickness of the article operated upon.

6. In a leather beveling and splitting machine, in combination, a knife,a support for the article operated upon, means for moving one of saidelements toward the other to effect a bevel cut, means for feeding thearticle past the knife, and a pattern to determine the bevel of the cutin the article.

7. In a leather beveling and splitting machine, in combination, a knife,a support for the article operated upon, means for moving one of saidelements toward the other to effect a bevel cut, means for feeding thearticle past the knife, a pattern to determine the bevel of the cut inthe article, and means for measuring the thickness of the articlebetween the said knife and support.

8. In a leather beveling and splitting machine, in combination, a knife,a support for the article operated upon, means for moving one of saidelements toward the other to efiect a bevel cut, means for feeding thearticle past the knife, a pattern to determine the bevel of the cut inthe article, means for measuring the thickness of the article betweenthe said knife and support, a table in proximity to said supportprovided with a scale to determine the length of the bevel out accordingto the thickness of the article between said knife and support.

9. In a leather beveling and splitting machine, in combination, a knife,a rotatable bed roll to support the work, an oscillating support forsaid bed roll, means for moving the work past the knife while supportedby said bed roll, and means for moving said oscillating support to movethe bed rolls toward and from said knife.

10. In a leather beveling and splitting machine, in combination, aknife, a rotatable bed roll to support the work, an oscillating supportfor said bed roll, means for moving the work past the knife whilesupported by said bed roll, means for moving said oscillating support tomove the bed roll toward and from said knife, a rotating scre'w spindleconnected with said rotatable bed roll to rotate therewith, a conicalnut mounted on said spindle, means co-operating therewith to effectmovement of said bed roll toward said knife and means for locking saidnut against rotation to effect axial movement thereof on said spindle.

In testimony whereof I aflix my signature.

1 FRIEDRICH WILHELM SIMON.

